There's nothing difficult in swapping an occupancy sensor if you are capable of removing and refitting a leather upholstery on the seat.
I bought my M-seats from RHD z4 and had to swap a sensor from left to right seat - a company that specializes in leather upholstering did it for almost no charge (they charged me around 30 bucks, but as labour is cheap in Poland I think it will cost around 100-150$ in the US)
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2006 3.0si
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